Publish Chimera GFX source

docs/retroarch/phase-1.0bk-bounded-real-facade-host-fixture-gate.md

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+# Phase 1.0BK: bounded real-facade host-fixture gate
+
+Status: `EXACT_HOST_FIXTURES_AUTHORIZED_NO_MATERIALIZER`
+
+Date: 2026-07-29
+
+Phase 1.0BJ installed and bound the exact host tools and added a dormant real
+process/filesystem facade. This gate permits one local WSL test suite against
+four exact Python fixtures: success, nonzero exit, output overflow and timeout.
+Each fixture may be started once. They have no filesystem, network, SDL,
+RetroArch or device operation. The timeout fixture exists solely to prove the
+process-group termination path.
+
+This permission does not accept arbitrary commands and does not activate the
+eight materializer requests. It does not authorize an SDL build, a RetroArch
+target build, an artifact, a PS5 connection, transfer or execution. The suite
+result must be recorded separately before any materializer gate is considered.